A compressor includes a compressor rotor and a motor disposed about a common axis. The motor includes a rotor shaft coupled to the compressor rotor and configured to drive the compressor rotor; a thrust shaft disposed at an opposite end of the motor from the rotor shaft; a tie rod disposed on the common axis and extending through the rotor shaft, thrust shaft, and the compressor rotor; a first journal bearing disposed about the rotor shaft and concentrically about the common axis to radially support the rotor shaft; a journal bearing support disposed concentrically about the first journal bearing; and a cooling fluid inlet disposed adjacent to the bearing support and in fluid communication with the first journal bearing. The rotor shaft includes a plurality of orifices. The tie rod axially retains the compressor rotor at a forward end and the motor at an aft end.
Embodiments of the disclosure provide an electric power distribution (EPD) system that includes a first power conversion system electronically connected between a first voltage source and a bus, along with a second power conversion system electronically connected between the bus and a first load. The first power conversion system is operable to, responsive to receiving power that originated from the first voltage source in a first modality, generate a first voltage and provide the first voltage to the bus. The second power conversion system is operable to, responsive to receiving a bus-voltage of the bus, generate a second voltage and provide the second voltage to the first load. The bus-voltage is greater than the second voltage.
H02J 1/12 - Parallel operation of dc generators with converters, e.g. with mercury-arc rectifier
H02J 50/23 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of transmitting antennas, e.g. directional array antennas or Yagi antennas
H02J 50/27 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of receiving antennas, e.g. rectennas
H02J 50/30 - Circuit arrangements or systems for wireless supply or distribution of electric power using light, e.g. lasers
H02M 3/158 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
3.
SYSTEM FOR DETECTING SERIES ARC FAULTS IN ELECTRIC CABLING
A power supply system includes: a DC power supply, a load to be powered by the power supply, and a DC electrical conductor electrically connected at a first end to the power supply and at a second end to the load. The system further includes: a fault detection system configured to detect a series arc event in the DC electrical conductor, the fault detection system includes: a sense line conductor having a high impedance termination at the second end; a differential amplifier having a first input connected to the sense line conductor at a first terminal(S) and a second input connected to the DC electrical conductor at a second terminal (L), and an output providing a voltage differential output; and a comparator to compare the voltage differential output to a predetermined voltage differential threshold, the comparator providing a fault output dependent on the comparison.
A hydraulic drag brake is provided for use with a driveline. The hydraulic drag brake includes a fluid circuit including first and second loops, a first valve disposed along the first loop to allow a flow of fluid through the first loop in a first direction and to prevent a flow of the fluid through the first loop in a second direction, a second valve disposed along the second loop and a pump coupled to the driveline and configured to pump the fluid through the fluid circuit in the first direction and across the first valve with the driveline occupying a retracted position or engaging in an extend motion and in the second direction and over the second valve with the driveline occupying an extended position.
Embodiments of the disclosure provide an electric power distribution (EPD) system that includes a first conversion module electronically connected between a voltage source and a bus. The first conversion module includes a transformer system electronically connected to a first converter circuit having a first maximum voltage rating. The voltage source provides a voltage source output, and the first maximum voltage rating is less than the voltage source output.
A gas turbine engine includes a combustor section, and a turbine section including a turbine configured to be driven by a flow of combustion products from the combustor section. A thermophotovoltaic cell is positioned at at least one of the combustor section or the turbine section. The thermophotovoltaic cell is configured to convert radiant heat energy from at least one of the combustor section or the turbine section into electrical energy. A method of operating a gas turbine engine includes combusting a mixture of fuel and air at a combustor section, driving a turbine of a turbine section via urging of combustion products from the combustor section to the turbine, and converting radiant thermal energy from at least one of the combustor section or the turbine section to electrical energy via a thermophotovoltaic cell positioned at at least one of the combustor section or the turbine section.
F02C 3/14 - Gas-turbine plants characterised by the use of combustion products as the working fluid characterised by the arrangement of the combustion chamber in the plant
F02C 7/18 - Cooling of plants characterised by cooling medium the medium being gaseous, e.g. air
7.
SMART IOT CONTROLLER FOR GATHERING AND TRANSMITTING AIRCRAFT HEALTH INFORMATION DURING FLIGHT
Embodiments of the disclosure provide an aircraft health monitoring system having an in-flight controller. The controller is configured to, responsive to a determination that an aircraft is in-flight, access a sensor network system of the aircraft to generate in-flight system health (IFSH) information. A transmission operation is initiated that transmits the IFSH information through a wireless communications path to a ground-based flight monitoring system. The ground-based flight monitoring system is operable to initiate an aircraft management operation associated with the aircraft.
A compressor includes a compressor rotor and a motor disposed about a common axis. The motor includes a rotor shaft coupled to the compressor rotor and configured to drive the compressor rotor; a thrust shaft disposed at an opposite end of the motor from the rotor shaft; a tie rod disposed on the common axis and extending through the rotor shaft, thrust shaft, and the compressor rotor, the tie rod axially retaining the compressor rotor at a forward end and the motor at an aft end; a cooling fluid inlet disposed at an aft end of the motor; and a motor rotor cooling flow path extending from the thrust shaft to the rotor shaft. The rotor shaft includes a plurality of orifices that open to a cavity on a backside of the compressor rotor and fluidly couple the motor rotor cooling flow path to the cavity.
A fuel delivery system for a gas turbine engine includes a fuel source and a main fuel pump configured to deliver a first flow of fuel to a combustor assembly of the gas turbine engine under a first, relatively high fuel demand operating condition of the gas turbine engine. A secondary fuel pump is configured to deliver a second flow of fuel to the combustor assembly under a second, relatively low fuel demand operating condition of the gas turbine engine.
An LLC voltage converter for converting a DC input voltage to a DC output voltage includes a transformer and a controller. The controller is arranged to monitor an operational parameter and operate the LLC voltage converter in a first mode, in which the transformer has a first turns ratio, when a value of the operational parameter is within a first range. In response to determining that the value of the operational parameter has changed to be outside the first range and inside a second range, the controller is arranged to transition the LLC voltage converter from operating in the first mode to operate in a second mode, in which the transformer has a second turns ratio. The first range at least partially overlaps the second range.
H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
11.
JOURNAL BEARING HYBRID DAMPENING FOR INCREASED TEMPERATURE RANGE
A bearing system for a rotatable shaft includes a bearing shaft coaxial with the rotatable shaft, a bearing coaxial with the bearing shaft, a bearing housing surrounding the bearing and having a plurality of retention channels disposed axially along the bearing housing, and a dampening assembly comprising a plurality of circumferential seal elements disposed within each of the plurality of retention channels. A first subset of the plurality of seal elements is formed from a first material and a second subset of the plurality of seal elements is formed from a second material.
F16C 33/78 - Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
F16C 19/04 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
12.
MID-PRESSURE WATER SEPARATION FOR ENVIRONMENTAL CONTROL SYSTEM
A water separator for use in an environmental control system of an aircraft including an outer housing having an upstream end, a downstream end, and a central longitudinal axis. A plurality of vanes are arranged within the outer housing and are spaced about the central longitudinal axis. A plurality of flow channels are formed between the plurality of vanes and the outer housing. The plurality of flow channels have a spiral-like configuration about the central longitudinal axis. At least one ring vane is arranged within the outer housing and extends parallel to the longitudinal axis.
A water separator for use in an environmental control system of an aircraft includes an outer housing having an upstream end, a downstream end, and a longitudinal axis. A vane assembly is arranged within the outer housing and is spaced about the longitudinal axis. The vane assembly defines a plurality of flow channels. At least one flow channel of the plurality of flow channels is located radially outward of another flow channel of the plurality of flow channels. The plurality of flow channels have a spiral-like configuration about the longitudinal axis and a flow length of the plurality of flow channels is equal.
B01D 45/16 - Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by the winding course of the gas stream
B64D 13/06 - Arrangements or adaptations of air-treatment apparatus for aircraft crew or passengers, or freight space the air being conditioned
14.
DIFFERENTIAL MODE INDUCTOR FOR HIGH POWER AEROSPACE FILTERING APPLICATIONS
A differential mode inductor includes a core and a winding assembly. An outer core ring stack includes a stack of outer laminated sheets defining an upper ring surface and a lower ring surface. Each of the upper and lower ring surfaces extend from an outer ring surface to an inner ring surface which surrounds a core central opening in which a center core leg stack is disposed. The center core leg stack includes a stack of center laminated sheets. Each center laminated sheet includes a center core leg. The center core leg stack is separated from the outer core ring stack by a distance to define a core gap region configured to store magnetic energy resulting from the magnetic field. A winding assembly is disposed in the core central opening and includes a plurality of coil windings configured to produce a magnetic field in response to electrical current flowing therethrough.
A pressurization system for a vehicle includes a plurality of medium sources including a first medium source, a second medium source, and a third medium source. A cabin air compressing device is arranged in fluid communication with the plurality of medium sources. The cabin air compressing device includes a shaft, a compressor connected to the shaft and at least one turbine connected to the shaft. The compressor has a compressor inlet fluidly coupled to the first medium source and a compressor outlet fluidly connected to an inlet of a downstream environmental control system pack. Energy extracted within the at least one turbine is configured to drive the compressor.
An electric motor drive system for a propulsion device. The system includes a battery stack having an earth terminal and an end terminal and an electric motor electrically connected to be powered by the battery stack. The motor is configured to be connected to drive the propulsion device, The system also includes: a power converter electrically connected between the battery stack and the electric motor; and a switch between the power converter and the battery stack. The switch is arranged to switch between a first state electrically connecting the end terminal of the battery stack to the power converter to provide a maximum battery voltage to the power converter, and a second state electrically connecting a tap point from one or more intermediate nodes, intermediate the earth terminal and the end terminal, of the battery stack, to provide a voltage less than the maximum battery voltage to the power converter.
B64D 35/022 - Transmitting power from power plants to propellers or rotorsArrangements of transmissions specially adapted for specific power plants for electric power plants of hybrid-electric type
B64D 31/16 - Power plant control systemsArrangement of power plant control systems in aircraft for electric power plants
H01M 10/42 - Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
A shroud reinforcement is provided for a shroud that is coaxial with and partially surrounds a rotor and that includes tubular and flange sections and a transition section axially interposed between the tubular and flange sections. The shroud reinforcement includes first fiber-reinforced polymer-matrix composite reinforcement elements with fibers extending along an axial dimension of the rotor and being disposed to reinforce the transition section and second fiber-reinforced polymer-matrix composite reinforcement elements with fibers extending along a circumferential dimension of the rotor and being disposed to reinforce the transition section.
An aircraft includes an electrical system having at least one cooled electrical component. The at least one cooled electrical component is a low grade heat source. The aircraft further includes a cooling system with a coolant loop passing through the at least one cooled electrical component and through a first adsorption cooler. The first adsorption cooler is configured to cool coolant in the cooling loop using an adsorption process.
A piston retainer plate includes a first end, a second end opposite the first end, a piston pocket extending from the first end to the second end, a straight annular surface extending from the first end, an angled annular surface extending at an angle from the second end, a curved annular surface connected to the straight annular surface and the angled annular surface, the curved annular surface being between the straight annular surface and the angled annular surface, and a curved vent within the curved annular surface. The straight annular surface, the angled annular surface, and the curved annular surface define the piston pocket.
A fuel pumping system for delivering fuel to an engine component includes a boost pump having a boost pump outlet and a main pump having a main pump inlet and a main pump outlet. The main pump inlet is fluidly connected to the boost pump outlet via a main pump feed conduit. A fuel control conduit is fluidly connected to the main pump outlet and to the engine component. A third pump has a third pump inlet and a third pump outlet. The third pump outlet is fluidly connected to the engine component. A third pump conduit is fluidly connected to the main pump outlet and to the third pump inlet. A valve is operable to control a fuel flow to the third pump in response to a pressurization demand of the engine component.
A water separator for use in an environmental control system of an aircraft includes an outer housing having an upstream end, a downstream end, and a central longitudinal axis. A plurality of vanes are arranged within the outer housing and are spaced about the central longitudinal axis. The plurality of vanes have an inlet end proximate to the upstream end and an outlet end proximate to the downstream end. An exterior edge of each of the plurality of vanes is in contact with an interior surface of the outer housing and a hollow channel is defined by an interior edge of the plurality of vanes. A plurality of flow channels is formed between the plurality of vanes and the outer housing. The plurality of flow channels has a spiral-like configuration about the central longitudinal axis.
An actuation assembly includes a control valve, a first actuator and a second actuator fluidly connected to the control valve via plumbing. The first actuator has a first extend port and the second actuator having a second extend port. A flow control device fluidly connected to the first actuator and the second actuator is operable to balance a flow rate of a fluid at the first actuator with the flow rate of the fluid at the second actuator. The flow control device is arranged within the plumbing, at a position between the control valve and the first extend port and the second extend port.
A method for making an article includes inputting a digital model of the article into an additive manufacturing apparatus or system comprising an energy source, wherein the energy source is a ring laser having a beam size and repeatedly applying energy from the ring laser to successively applied incremental quantities of a powder particles to fuse the powder particles to form the article corresponding to the digital model. Applying the energy includes passing the energy from the ring laser through an optical system to narrowing a width of the beam size to create a smaller beam size before the energy reaches the powder particles.
An apparatus for generating electrical power includes a rotating member surrounded by a fixed structure. The apparatus also includes at least one magnet, each of which is located on the rotating member. The apparatus further includes at least one distributed generator module located on the fixed structure and configured to generate an electrical power signal responsive to movement of the at least one magnet past the at least one distributed generator module. The at least one distributed generator module is configured to be independently activated and deactivated responsive to a control signal.
H02K 7/18 - Structural association of electric generators with mechanical driving motors, e.g.with turbines
F01D 15/10 - Adaptations for driving, or combinations with, electric generators
H02K 11/04 - Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for rectification
A time-interleaved analogue-to-digital converter including a first analogue-to-digital converter and a second analogue-to-digital converter, each arranged to sample a respective analogue input periodically and produce a respective digital output based on the sampled analogue input, and also including a signal interleaving portion, arranged to combine the digital outputs to produce a digital output signal. The time-interleaved analogue-to-digital converter is configured for operation both in an operational mode and a calibration mode. In the operational mode, the second analogue-to-digital converter is arranged to sample the analogue input a first time period after the first analogue-to-digital converter samples the analogue input. In the calibration mode, the second analogue-to-digital converter is arranged to sample the analogue input simultaneously with the first analogue-to-digital converter, or a second time period apart from a time at which the first analogue-to-digital converter samples the analogue input. The second time period is shorter than the first time period.
A resonant circuit for a DC-DC power converter. The resonant circuit includes: a resonant inductance and a resonant capacitance. The resonant capacitance is provided by two capacitors configured to be connected in series to an input switching stage of a DC-DC power converter, and the resonant inductance comprising a resonant inductor connected in series with a first of the capacitors. The resonant circuit can be part of a DC-DC power converter. The converter can include: input DC voltage bus; an input switching stage connected across the input DC bus; the resonant circuit; a voltage converter; and an output rectifier stage; wherein the voltage converter comprises an auto transformer having an input side inductance comprising a first inductance part (P11) and a second inductance part (P21) in series and a tap output between the first and second inductance part, wherein the voltage converter has a conversion ratio of (P11+P21)/P21.
H02M 3/00 - Conversion of DC power input into DC power output
H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
H02M 7/5387 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
A fluid delivery system is provided including a reservoir including oil, a hydraulic pump in fluid communication with the reservoir, and a heat exchanger system. The heat exchanger system is in fluid communication with the hydraulic pump, a generator, and an engine gearbox. The hydraulic pump is configured to deliver the oil to the heat exchanger system. The heat exchanger system is configured to provide the oil according to first temperature criteria to the generator and provide the oil according to second temperature criteria to the engine gearbox.
An environmental control system includes a component having a component inlet and a component outlet and a flow path fluidly connected to the component inlet and the component outlet. The flow path includes a turn upstream from the component inlet. At least one flow diverter element is arranged within the flow path between the turn and the component outlet. The at least one flow diverter element is positioned to uniformly distribute a flow across the component inlet.
A shouldered shaft assembly of a variable displacement, bent axis piston pump is provided. The shouldered shaft assembly includes a bearing retainer housing including radially inwardly facing tilt pad bearings and axially facing tilt pad thrust bearings and a shouldered shaft. The shouldered shaft is disposed in the bearing retainer housing and includes a first shaft section, a second shaft section and an axial surface. The second shaft section has a larger diameter than the first shaft section and includes an outer diameter (OD) surface. The OD surface faces and fluid-dynamically interacts with the radially inwardly facing tilt pad bearings. The OD surface is formed to define microscopic surface texturing for increased fluid-dynamic interaction. The axial surface extends between the first shaft section and the second shaft section. The axial surface faces and fluid-dynamically interacts with the axially facing tilt pad thrust bearings.
A system is provided including one or more piezoelectric assemblies, where the one or more piezoelectric assemblies include a plurality of piezoelectric transducers. The system includes amplifier circuitry coupled to the plurality of piezoelectric transducers and configured to provide an alternating-current (AC) voltage signal to one or more piezoelectric transducers of the plurality of piezoelectric transducers, based on a target configuration associated with removing regolith dust from a vehicle operable in a space environment. The one or more piezoelectric transducers are configured to vibrate based on a magnitude and a frequency of the AC voltage signal.
H10N 39/00 - Integrated devices, or assemblies of multiple devices, comprising at least one piezoelectric, electrostrictive or magnetostrictive element covered by groups
B60S 1/66 - Other vehicle fittings for cleaning for cleaning vehicle exterior
An electric aircraft includes system for operating the aircraft. The electric aircraft includes a wing having a first control surface, a second control surface, a battery and a gearbox mechanically coupled to the first control surface. The first control surface is operated, and a voltage is induced from mechanical energy generated during a deceleration of the first control surface that occurs while operating the first control surface, wherein an airflow across the first control surface causes the deceleration. The induced voltage can be stored at the battery or used to operate the second control surface using the induced voltage.
B64C 23/00 - Influencing air flow over aircraft surfaces, not otherwise provided for
B64C 13/50 - Transmitting means with power amplification using electrical energy
B64D 35/026 - Transmitting power from power plants to propellers or rotorsArrangements of transmissions specially adapted for specific power plants for electric power plants the electric power plant being integral with the propeller or rotor
A time-interleaved analogue-to-digital converter including a first analogue-to-digital converter, a second analogue-to-digital converter, and a third analogue-to-digital converter, each arranged to sample an analogue input and produce a respective digital output based on the sampled analogue input, and also including a signal interleaving portion, arranged to combine the digital outputs from the analogue-to-digital converters to produce a digital output signal. The time-interleaved analogue-to-digital converter is configured for operation both in an operational mode, and in a compensation mode when the third analogue-to-digital converter is non-functional. In the operational mode, the first and second analogue-to-digital converter sample the analogue input respectively at a first frequency and a second frequency. In the compensation mode, the first and second analogue-to-digital converter sample the analogue input respectively at a third frequency and a fourth frequency. The third frequency is higher than the first frequency, and the fourth frequency is higher than the second frequency.
A structural complexity analysis system includes a system modeling language (SysML) module and a numerical computation module. The SysML module determines a complexity interaction profile of an engineering system, which includes a plurality of nodes and a plurality of connectors, each connector establishing a connection between a sub-set of nodes among the plurality of nodes, and determines a complexity node profile of parts, which defines a complexity of at least one node among the plurality of nodes. The SysML module further generates an interfaces table based on the complexity interaction profile, and generates generate a node table based on the complexity node profile. The numerical computation module receives the interfaces table and the node table, and applies at least one numerical computation tool to the interfaces table and the node table to determine an overall structural complexity of the engineering system.
A system includes a vortex tube. A first thermoelectric terminal is in thermal communication with the first outlet of the vortex tube. A second thermoelectric terminal is in thermal communication with the second outlet of the vortex tube. An electrical circuit is electrically connected to the first thermoelectric terminal and to the second thermoelectric terminal for electrical conduction of Peltier-effect thermoelectric current. The systems and methods described herein can be used to enhance temperature difference generated in a vortex tube, and/or to harvest energy from the temperature difference in a vortex tube.
F24H 3/08 - Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators by tubes
H10N 10/10 - Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects operating with only the Peltier or Seebeck effects
H10N 10/817 - Structural details of the junction the junction being non- separable, e.g. being cemented, sintered or soldered
35.
WASTE MANAGEMENT SYSTEM WITH BUILT-IN PIEZOELECTRIC BASED INTERFACES FOR WATER RECOVERY AND STERILIZATION VIBRATION
A system is provided. The system includes: a receptacle; one or more piezoelectric transducers included in the receptacle; and amplifier circuitry coupled to the one or more piezoelectric transducers and configured to provide an alternating-current (AC) voltage signal to the one or more piezoelectric transducers, based on a target configuration associated with recovering water from a substance included in the receptacle. The one or more piezoelectric transducers are configured to vibrate based on a magnitude and a frequency of the AC voltage signal. The system is configured to extract a mist form of the water from the substance, based on the vibration of the one or more piezoelectric transducers.
In accordance with at least one aspect of this disclosure, a composite rotor includes a first rotor portion defining a first rotational axis and having a first magnet therein and a second rotor portion defining a second rotational axis and having a second magnet therein. A stator portion is disposed radially between the first rotor portion and the second rotor portion. The first rotor portion and the second rotor portion are formed of composite filaments and/or composite tape, and the composite filaments and/or composite tape are wrapped in both a first direction and a second direction different from the first direction relative to the first and second rotation axes.
H02K 16/02 - Machines with one stator and two rotors
H02K 15/02 - Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
37.
COVERLAY AS PRINTED CIRCUIT BOARD (PCB) VOLTAGE INSULATOR UNDER CONNECTORS
A circuit board system includes a printed circuit board (PCB) having a first side and a second side opposite the first side. A plurality of plated through holes (PTHs) are defined through the PCB from the first side to the second side. A respective pad is defined at each end of each PTH of the plurality of PTHs. The PCB includes circuit traces electrically interconnecting among the plurality of PTHs for forming PCB circuitry. A coverlay is adhered to the first side of the PCB for insulating voltages among the plurality of PTHs.
A system is provided including one or more piezoelectric assemblies, wherein the one or more piezoelectric assemblies include a plurality of piezoelectric transducers. The system includes amplifier circuitry coupled to the plurality of piezoelectric transducers and configured to provide an alternating-current (AC) voltage signal to one or more piezoelectric transducers of the plurality of piezoelectric transducers, based on a target configuration associated with removing regolith dust. The one or more piezoelectric transducers are configured to vibrate based on a magnitude and a frequency of the AC voltage signal.
B08B 7/02 - Cleaning by methods not provided for in a single other subclass or a single group in this subclass by distortion, beating, or vibration of the surface to be cleaned
An electrical system for an aircraft comprises a local controller configured to control a power source for an aircraft using droop control in accordance with a droop gain. The local controller is configured, in response to receiving a command, to adjust the droop gain from a first value to a second value progressively over a time interval according to a predetermined function of time.
A fuel delivery system for a gas turbine engine includes a fuel source and a main fuel pump configured to deliver a first flow of fuel to a combustor assembly of the gas turbine engine under a first fuel demand operating condition of the gas turbine engine. A secondary fuel pump is arranged in a fluidly parallel relationship with the main fuel pump. The secondary fuel pump is configured to deliver a second flow of fuel to the combustor assembly under a fuel demand second operating condition, different from the first fuel demand operating condition of the gas turbine engine.
A system can include a chassis and a multilayer structure disposed within the chassis, the multilayer structure configured to attract and electrically isolate an arc. The multilayer structure can include one or more outer layers configured and adapted to attract the arc and an inner layer configured and adapted to electrically isolate the arc. The one or more outer layers can include a first outer layer and a second outer layer. The inner layer can be sandwiched between the first outer layer and the second outer layer.
An air cycle system for a gas turbine engine includes a heat exchanger having an air cycle inlet. An air cycle machine includes an air cycle machine outlet and an annular flexible interface coupling connecting the air cycle inlet to the outlet. The flexible interface coupling includes a receiving portion having a flared region across which a diameter of a heat exchanger portion increases and a landing portion across which the diameter of the heat exchanger portion is maintained. An air cycle machine portion is received in the receiving portion and includes an outlet flange and a diffuser radially inward of the outlet flange. The outlet flange includes a radially outward facing surface contacting a radially inward facing surface of the landing portion. The diffuser is configured to move axially and radially relative to the outlet flange.
A decentralized scheduler node for an unstable network of heterogenous nodes collects status information including a resource capacity of each of a network of nodes with which it is in communication. For each current computation job in its input queue, the scheduler node determines which connected nodes have suitable resource capacity to execute the current job and a reliability of each suitable node based on statistical evaluation of its historical availability for job deployment. From the set of suitably powerful and reliable candidate nodes, the scheduler node selects a candidate node of sufficient resource capacity for deployment of the current job based on the probability of a subsequent job appearing during the execution time of the current job, the subsequent job having an equivalent or greater resource requirement and thus at risk of waiting in the input queue if the selected node is required for executing the subsequent job.
An apparatus and a method of determining a state of an actuator in an airplane. The apparatus includes a mirror coupled to the actuator, wherein a location of the mirror is dependent on the state of the actuator, a shaft for moving the mirror upon a change in the state of the actuator, and a processor. Incident light is reflected off of the mirror to create a reflected light. The processor receives the reflected light from the mirror, detects a change in a parameter of the reflected light generated by moving of the mirror, and determines the state of the actuator based on the change in the parameter.
A servovalve is provided comprising a fluid transfer valve assembly (5) comprising a primary fluid supply port (14) and a control port (15), a moveable valve spool (4) arranged to regulate flow of fluid through a first fluid pathway from the primary fluid supply port (14) to the control port (15), and a jet pipe assembly configured to axially move the spool (4) relative to the fluid transfer valve assembly (5) in response to a control signal to regulate the fluid flow along the first fluid pathway. The jet pipe assembly comprises a steerable nozzle (19’) from which fluid is directed to the ends (4a, 4b) of the spool in an amount determined by the control signal. The spool comprises an opening (28’) and an interior passage (50) fluidly coupling the opening to the jet pipe assembly via a second fluid pathway. The first fluid pathway is fluidly isolated from the second fluid pathway within the spool.
F15B 13/042 - Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
F16K 11/07 - Multiple-way valves, e.g. mixing valvesPipe fittings incorporating such valvesArrangement of valves and flow lines specially adapted for mixing fluid with all movable sealing faces moving as one unit comprising only sliding valves with linearly sliding closure members with cylindrical slides
46.
BALANCED HARMONIC DRIVE WITH OUTPUT SHAFT DISCONNECT
A harmonic drive, having: a housing; an output shaft within the housing; an input shaft within the housing, the input shaft is configured for being in a first position in which rotation of the input shaft rotates the output shaft, and a second position that is axially offset from the first position, in which rotation of the input shaft does not rotate the output shaft; a solenoid coil within the housing that, when energized, moves the input shaft to the second position; and a spring within the housing that, when the solenoid coil is not energized, moves the input shaft to the first position.
B64C 13/34 - Transmitting means without power amplification or where power amplification is irrelevant mechanical using toothed gearing
F16H 1/32 - Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear
A digital signal processing system to determine a position of a resolver includes a digital signal processor that includes first timer and second timer. The first timer creates a resolver excitation signal from a series of samples and creates an incrementing Crossing signal each time the resolver excitation signal crosses zero. When the Crossing signal has a first value, a multiplexer provides resolver sine signals to an analog to digital converter to convert the resolver sine signal to a series of digital sine samples, and the second timer stores the series of digital sine samples in a sine sample buffer. When the Crossing signal has a second value, the multiplexer provides the resolver cosine signal to the analog to digital converter to convert the resolver cosine signal to a series of digital cosine samples, and the second timer stores the series of digital cosine samples in a buffer.
A hoist application system is provided. The hoist application system includes a motor drive unit, which is receptive of a final duty command and which drives a motor in accordance with the final duty command, a closed-loop control unit configured to generate a closed-loop duty command, an open-loop control unit configured to generate an open-loop duty command and a switch logic unit. The switch logic unit is receptive of direct current (DC) system information, the closed-loop duty command and the open¬loop duty command, and is configured to generate the final duty command from one of the closed-loop duty command and the open-loop duty command based on the DC system information.
A variable gear ratio gear set system includes a planetary gear set including a sun gear locate at a central axis of rotation, a plurality of planet gears meshed with the sun gear and retained at a carrier, and a ring gear surrounding the plurality of planet gears and meshed therewith. An input shaft inputs rotational energy to the planetary gear set at a first rotational speed, and an output shaft outputs rotational energy from the planetary gear set at a second rotational speed. A plurality of one-way clutches are positioned in the gear set and are engageable such that the system has a first gear ratio when the input shaft is rotated in a first direction, and a second gear ratio when the input shaft is rotated in a second direction.
A motor temperature control system for an electric aircraft is provided. The motor temperature control system includes an electric motor, circuitry and a thermoelectric generator (TEG). The TEG is disposed in thermal communication with the electric motor. The TEG is electrically coupled to the circuitry such that heat generated by the electric motor is converted by the TEG to electrical energy that generates a voltage drop across the circuitry.
A passive filter assembly can include a filter bowl configured to enclose a filter element therein, a fluid inlet in fluid communication with the filter bowl, a fluid outlet in fluid communication with the filter bowl downstream of the fluid inlet, and a filter cap disposed gravitationally below the filter bowl and configured to receive denser fluid components separated from a bulk fluid when the denser fluid components fall into the filter cap. The filter bowl can be shaped to allow the bulk fluid to swirl therein. The fluid inlet can be configured to cause the bulk fluid entering through the fluid inlet to swirl within the filter bowl to be centrifuged to separate one or more denser fluid components from the bulk fluid. The fluid outlet can be configured to receive a filtered flow downstream of a filter element.
Thermal management systems include a vapor cycle and a liquid cycle sharing a common working fluid. The vapor cycle includes, along a vapor cycle flow path, a compressor and a condenser. The liquid cycle includes, along a liquid cycle flow path, a fluid driver, a load, a regulator valve, and a phase change material heat exchanger. A cold sink is thermally coupled to a heat load. A separator is configured to separate liquid and vapor portions of the working fluid and direct the liquid into the liquid cycle and the vapor into the vapor cycle. The separator is part of both the vapor cycle and the liquid cycle. The regulator valve controls a temperature of the working fluid within the liquid cycle at a location upstream of the phase change material heat exchanger to control a mode of operation of the phase change material heat exchanger.
F25B 43/04 - Arrangements for separating or purifying gases or liquidsArrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for withdrawing non-condensible gases
F25B 13/00 - Compression machines, plants or systems, with reversible cycle
A heat exchanger includes an outer shell enclosing an interior space. An inlet extends through the outer shell and is in fluidic communication with the interior space. An outlet extends through the outer shell and is in fluidic communication with the interior space. At least one phase change element is inside the interior space and includes a core comprising a phase change material.
An aircraft power system for power a plurality of loads of an aircraft includes a first secondary power distribution assembly (SPDA) network configured to manage electrical power delivered to a first load among the plurality of loads, and a second SPDA network configured to manage electrical power delivered to a second load among the plurality of loads. The aircraft power system further includes a synthetic load management system (SLMS) in signal communication with the first SPDA and the second SPDA. The SLMS is configured to reference at least one operational condition of the aircraft and historical data corresponding to the first load and the second load. The SLMS is configured to predict load demands of the of the first load and the second load operating at different operating conditions based on the historical data.
In accordance with at least one aspect of this disclosure, a system includes, a collection arm configured to collect an aerosol sample from a cloud and a detection module operatively connected to the collection arm configured to analyze a composition of the sample from the cloud. In certain embodiments, one or more of the collection arm and/or the detection module can be configured to couple to a mobile platform, including for example, a land vehicle, aircraft, or watercraft. In certain embodiments one or more of the collection arm and/or the detection module can be configured to couple to a stationary structure, for example a building
Testing a gasket within a groove formed around a top of an enclosure and covered by a lid, including steps of: positioning a needle of a probe within a notch formed in an outer wall that surrounds the groove; and: injecting input current through the probe; comparing input voltage from the probe in the notch and an output voltage induced in conductive fasteners that secure the lid to the enclosure, to determine that a difference in the voltages is within a predetermined range, where voltage at the fasteners is measured with another probe; or injecting the input current into the fasteners; and comparing the input voltage at the fasteners with the output voltage induced in the gasket and measured via the probe in the notch, to determine that the difference in the voltages is within the predetermined range, where voltage at the fasteners is measured with the another probe.
A hold open rod has a control sleeve, an outer cylinder, lock balls, a lock sleeve, a piston, a piston head, a release spring, and a lock spring. The control sleeve has first and second cavity sections, an inner radial surface, a CS channel, and a pin. The outer cylinder has an OC inner cavity, OC inner and outer radial surfaces, an OC axial end wall, lock ball apertures, and a pin guide slot. The lock balls are configured to pass through the lock ball apertures. The piston has first and second sections. The piston head has an outer radial surface, a channel, and a piston bore. The piston bore is configured to receive the first section of the piston. The release spring biases the control sleeve toward a first axial end. The lock spring biases the lock sleeve toward a second axial end.
B64D 29/06 - Attaching of nacelles, fairings, or cowlings
E05C 17/30 - Devices for holding wings openDevices for limiting opening of wings or for holding wings open by a movable member extending between frame and wingBraking devices, stops or buffers, combined therewith by mechanical means with a movable bar or equivalent member extending between frame and wing of extensible, e.g. telescopic, construction
A method for controlling a fuel system for a gas turbine engine is disclosed. The method includes directing fuel from an outlet of a main pump to an inlet of a fuel oil cooler. Fuel is directed from an outlet of the fuel oil cooler to a fuel control. The fuel control is in fluidic communication with a burner of the gas turbine engine. Fuel is directed from the outlet of the main pump to the fuel control through a fuel-oil-cooler bypass valve whenever an augmentor pump of the fuel system is actively pumping fuel to an augmentor of the gas turbine engine. The fuel-oil-cooler bypass valve forms a bypass flow path around the fuel oil cooler.
A nut for use in an actuator assembly having a rotatable screw includes an outer nut portion and an inner nut portion removably coupled to the outer nut portion. The inner nut portion is rotatably couplable to the rotatable screw. At least one antirotation pin is positionable between the outer nut portion and the inner nut portion to restrict rotation of the inner nut portion relative to the outer nut portion.
F16B 39/28 - Locking of screws, bolts, or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
An ion generator includes a high voltage source, a body defining a central axis, and multiple arms extending from the body. The body has a primary conductive line electrically coupled to the high voltage source, and a first insulating covering surrounding the primary conductive line. Each arm has an emitter array and a secondary conductive line. The emitter array is disposed at a distal end of the arm relative to the body. The secondary conductive line is electrically coupled to the primary conductive line at a proximal end of the arm relative to the body and extends to the emitter array. The arms are distributed about the central axis, such that the orientations of the emitter arrays and the connection of each arm to the central body are distributed helically, spirally, or symmetrically with respect to other arms, relative to the central axis.
An aircraft air supply system for generating pressurized air includes a compressor configured to receive and pressurize a flow of outside air, a turbine operatively coupled to the compressor by a shaft and configured to drive the compressor, a fluid pathway fluidly connecting the compressor to an environmental control system pack, an outflow pathway fluidly connecting a cabin of the aircraft to the turbine, a surge relief pathway fluidly connecting the compressor to the outflow pathway and the turbine, and a surge relief valve disposed within the surge relief pathway. In a first operational state, the surge relief valve is open to allow a flow of surge relief air to flow from the compressor to the outflow pathway via the surge relief pathway, the surge relief air further flowing through the turbine.
B64D 13/02 - Arrangements or adaptations of air-treatment apparatus for aircraft crew or passengers, or freight space the air being pressurised
B64D 13/06 - Arrangements or adaptations of air-treatment apparatus for aircraft crew or passengers, or freight space the air being conditioned
B64D 13/08 - Arrangements or adaptations of air-treatment apparatus for aircraft crew or passengers, or freight space the air being conditioned the air being heated or cooled
64.
Gear pump with suction housing element providing a tight seal between suction and high-pressure chamber to increase pump efficiency and method of providing tight seal
A gear pump includes a pump housing, a two meshed with a driven gear, a suction housing, and a suction cavity. The suction housing includes a body portion having first and second sealing disposed adjacent to outer diameters of the gears. A suction chamber wall is disposed between the first and second sealing surfaces and a sealing land is adjacent to a planar running surface of the pump housing. A flange of the suction housing has a third sealing surface disposed in contact with gear faces of the gears. The suction cavity is open to the inlet and defined in part by the suction chamber wall.
F04C 27/00 - Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
F04C 18/18 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with similar tooth forms
Circuit card assemblies may include an enclosure, first and second circuit boards installed, and a standoff for mounting the first and second circuit boards within the enclosure. The standoff includes a support body extending between the first and second circuit boards and has a first end and a second end. The first end is proximate the first circuit board and the second end is proximate the second circuit board. A threaded portion extends from the first end and passes through an aperture of the first circuit board. An internal bore is defined within the support body and includes an opening at the second end of the support body. A sleeve extends from the second end of the support body and has an opening aligned with the opening of the internal bore. The sleeve extends into an aperture of the second circuit board with a support shelf defined around the sleeve.
A system supplying air to an ASM of an aircraft inerting system, having: a first compressor, a turbine and a motor-generator coupled to each other; a second compressor coupled to the turbine and ASM; a first flow-path receiving cabin air and having: a first branch coupled to the first compressor; and a second branch coupled to the turbine, the motor-generator operates in a generator mode when pressure in the first flow-path is above a threshold; a second flow-path coupled between the first compressor and second compressor; a third flow-path coupled between the second compressor, a fuel tank and ASM; a first heat exchanger coupled to the second branch of the first flow-path to heat flow through the second branch before providing it to the turbine; and a second heat exchanger coupled to the second flow-path between the first compressor and second compressor to cool the flow through the second flow-path.
A system includes a low pressure machine, a high pressure machine, a motor controller device, a first set of switches configured to selectively couple the low pressure machine to an inverter or a rectifier included in the motor controller device, based on a control signal, and a second set of switches configured to selectively couple the high pressure machine to the inverter or the rectifier, based on the control signal.
A LLC voltage converter for converting a DC input voltage to a DC output voltage. The LLC voltage converter includes: a transformer having an input winding and an output winding, a controller and a current sensor. The current sensor measures a primary current through the input winding of the transformer and provides a measurement of the primary current to the controller. The controller determines when a secondary current, through the output winding of the transformer, is substantially zero based on the measurement of the primary current and a maximum value of the primary current.
H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
A heat exchange fin pack includes a plurality of rows of channel sections, each row comprising a plurality of adjacent legs, with each pair of adjacent legs connected to each other by, alternately, an upper crest part and a lower peak part. The legs and the upper crest part or the lower peak part define therebetween a channel section for fluid flow therethrough. The channel sections of each row are offset in a direction substantially transverse to the direction of flow from the adjacent channel sections of adjacent rows, thus forming a lanced offset fin pack in which the channel sections of adjacent rows combine to form staggered flow channels. Each channel section is formed to have a region of restricted diameter compared to another or other regions of that channel section.
A cooling structure for a rotary electric machine, the structure includes an annular radiator body defining an axis X between a first end and a second end, the annular body having a radially inner wall and a radially outer wall and a plurality of channels defined between the radially inner wall and the radially outer wall. Each channels extends from the first end to the second end, each channel having a radially varying profile along the length of the channel to interrupt the linear flow of fluid along the channel and to cause continuous changes in flow direction as the fluid flows from one end of the channel to the other.
In accordance with at least one aspect of this disclosure, a modular valve system includes, at least a first valve. The first valve can be configured to connect to one or more additional valves. The first valve includes, a first housing having a first inlet and a first outlet with a cylindrical flow path through the housing defined between the first inlet and the first outlet along a flow axis, where a diametral plane is defined diametrically spanning the cylindrical flow path.
F16K 1/22 - Lift valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
F16K 27/02 - Construction of housingsUse of materials therefor of lift valves
F16K 31/46 - Mechanical actuating means for remote operation
In accordance with at least one aspect of this disclosure, a limiting system for defining a rotational limit of a valve disc of a butterfly valve can include, a crank configured to be disposed on a terminal end of a valve shaft and configured to connect to a drive linkage to drive the crank and rotation of the valve disc. The crank can include a crank arm extending radially outward from the shaft. The crank stop can be configured to contact a portion of the second connecting flange of the first valve to physically limit rotation of the crank and the valve disc within a predefined rotational quadrant.
F16K 31/52 - Mechanical actuating means with crank, eccentric, or cam
F16K 1/22 - Lift valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
In accordance with at least one aspect of this disclosure, a retaining clip system for retaining an alignment of a valve disc within a valve housing can include, a c-shaped retaining clip configured to be disposed on a shaft of the valve and a shim pack including a plurality of shims configure to axially bound the retaining clip on the shaft.
F16K 1/22 - Lift valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
74.
COMPRESSOR OIL RECOVERY IN HYBRID VCC PUMPED TWO PHASE LOOPS
A cooling system includes a liquid loop, a vapor compression loop, and a heat exchanger in fluid communication with each of the liquid loop and the vapor compression cycle loop. The liquid loop includes a cold sink for cooling a heat load. The vapor compression cycle loop is fluidly coupled to the liquid loop by a separator, which is configured to separate a two-phase form of a working fluid received from the cold sink into a vapor form of the working fluid and a liquid form of the working fluid.
F25B 43/02 - Arrangements for separating or purifying gases or liquidsArrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
F25B 1/04 - Compression machines, plants or systems with non-reversible cycle with compressor of rotary type
75.
THERMAL MANAGEMENT SYSTEM FOR FUTURE VERTICAL LIFT AIRCRAFT
A thermal management system for an aircraft includes a liquid loop, a vapor compression cycle loop, and an air loop. The liquid loop includes a pump to deliver a working fluid a cold sink for cooling a heat load with the working fluid. The vapor compression cycle loop is fluidly coupled to the liquid loop by a separator. The separator is configured to separate a two-phase form of the working fluid into a vapor form of the working fluid for delivery to a compressor of the vapor compression cycle loop and a liquid form of the working fluid for delivery to the liquid loop. The air loop in thermal communication with the working fluid and configured to provide a cooling or heating air for an aircraft cabin.
A power generation system for an aircraft. The system includes an auxiliary power unit (APU), an APU generator mechanically linked to the APU, a generator control unit controllably coupled to the APU and an electromagnetic windmilling brake connected to APU generator. The electromagnetic windmilling brake includes a number of switched phase connections equal to a number of phases and the switched phase connections are configured to connect each output phase to an adjacent phase.
B64D 33/00 - Arrangement in aircraft of power plant parts or auxiliaries not otherwise provided for
H02K 7/106 - Structural association with clutches, brakes, gears, pulleys or mechanical starters with dynamo-electric brakes
H02K 7/18 - Structural association of electric generators with mechanical driving motors, e.g.with turbines
H02K 11/00 - Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
H02K 11/20 - Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
77.
MECHANICALLY SWITCHABLE ELECTRIC MACHINES FOR ELECTRIFIED PROPULSION
A system includes: a first electrical machine; a motor controller device coupled to the first electrical machine, wherein the motor controller device is configured to convert first power generated by the first electrical machine or provide second power to the first electrical machine; and a set of coupling devices configured to mechanically couple or decouple the first electrical machine and a turbine engine based on a mode of the system. The set of coupling devices includes: a first gearbox coupled to the first electrical machine; a first coupling device between the first gearbox and the turbine engine; a second gearbox; a second coupling device between the second gearbox and the turbine engine; and a third coupling device between the first gearbox and the second gearbox.
A power converter for providing power to one or more loads. The power converter is configured to be arranged in a parallel configuration with one or more additional power converters. The converter includes: a load balancing controller configured to receive an input voltage demand and output a compensated output voltage demand; an inverter for receiving an input voltage and converting this to an output voltage having an associated output current, the inverter comprising at least two DC-link capacitors; and a module configured to modulate the output voltage using a modulation scheme based on the compensated output voltage demand. The load balancing controller comprises a first feedback circuit configured to generate a first signal, wherein the first signal is generated based on a first measurement/calculation of the output current of the inverter scaled by a first gain.
A system includes a cap configured to attach to a first end of a pneumatic disconnect shaft assembly, the cap configured to seal a pneumatic chamber in a pneumatic mode and configured to allow access to the pneumatic chamber in a manual mode for manual rotation of a decoupling shaft. A method for manual rotation of a pneumatic disconnect shaft assembly includes removing a bolt from a cap that seals a pneumatic chamber of the pneumatic disconnect shaft assembly and rotating the cap about a longitudinal axis of a decoupling shaft to rotate the decoupling shaft, camming one or more locking pistons out of one or more grooves in the decoupling shaft.
A power converter for use with a fan engine of an aircraft comprises an electric-motor interface for electrical connection to an electric motor configured to be mechanically coupled to a driveshaft of the fan engine. The converter includes an inverting electric-motor power stage, having a DC side and an AC side, wherein the AC side of the electric-motor power stage is electrically coupled to the electric-motor interface. It comprises a thrust-reverser interface for electrical connection to an electric actuator of the fan engine for actuating a thrust reverser surface of the fan engine, and an inverting thrust-reverser power stage, having a DC side and an AC side, wherein the AC side of the thrust-reverser power stage is electrically coupled to the thrust-reverser interface.
B64D 27/35 - Arrangements for on-board electric energy production, distribution, recovery or storage
H02M 1/44 - Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
H02M 7/797 - Conversion of AC power input into DC power outputConversion of DC power input into AC power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
A stator core is provided and includes laminations disposed in a laminated arrangement to form a stator core body having an axial length extending in a lamination dimension. The stator core body includes an annular portion extending along the axial length, teeth extending radially from the annular portion and along the axial length and fins. Each tooth is formed to define one or more holes running along the axial length. The fins extend circumferentially across each of the one or more holes.
H02K 21/14 - Synchronous motors having permanent magnetsSynchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
A high voltage contact control system includes main contacts on positive and negative feeder lines and a short circuit protection system configured between the positive feeder line and the negative feeder line. The short circuit protection system is configured to be operably connected between the positive and negative feeder lines and configured to selectively provide a bypass path between the positive feeder line and the negative feeder line to divert current away from the first and second contacts. The short circuit protection system includes first and second state arc prevention elements that can operate in at least two modes. The bypass path is established by having one of the arc prevention elements in a fully on mode and another either fully on or in a linear mode.
H01H 9/00 - Details of switching devices, not covered by groups
H01H 9/38 - Auxiliary contacts on to which the arc is transferred from the main contacts
H01H 33/04 - Means for extinguishing or preventing arc between current-carrying parts
H01H 39/00 - Switching devices actuated by an explosion produced within the device and initiated by an electric current
H01H 85/02 - Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive Details
83.
BURST MODE IN-RUSH CURRENT CONTROL FOR ACTIVE CURRENT LIMITER CIRCUIT FOR DC-DC CONVERTER
A Direct Current (DC)-DC converter includes an input capacitor connected across a positive input terminal and a return input terminal. A current limiter includes a reference threshold portion connected across the positive input terminal and the return input terminal and a reference node. A difference amplifier circuit includes connections to the positive input terminal and to the return input terminal. The difference amplifier circuit generates a feedback output dependent on a voltage differential between the positive input terminal and the return input terminal. A comparison logic circuit receives the feedback output as a first comparison input and voltage of the reference node as a second comparison input and generates a comparison output. An active current limiting portion includes a current limiting transistor connected to at least one of the positive input terminal or the return input terminal and limits a current on one of the positive and return input terminals.
H02M 3/158 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
A heat exchanger having: an upstream header; a downstream header; a core extending from an upstream end at the upstream header to a downstream end at the downstream header, wherein the core includes tubes arranged in a square matrix that defines rows of tubes arranged in a row direction and columns of the tubes arranged in a column direction that is normal to the row direction, each of the tubes defining an upstream end and a downstream end that are spaced apart from each other in a longitudinal direction, and an outer boundary of the core is defined by outer ones of the tubes, wherein each of the tubes is longitudinally divided into tube segments; and tube connectors extending between the tube segments and interconnecting longitudinally and diagonally adjacent ones of the tube segments to stiffen the core.
F28D 1/053 - Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with the heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
B33Y 80/00 - Products made by additive manufacturing
F28D 1/02 - Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with the heat-exchange conduits immersed in the body of fluid
A system for providing power to one or more loads. The system includes: a central controller configured to output a speed demand for one or more loads; and a plurality of power converters arranged in a parallel configuration with each other and configured to provide power to the one or more loads. Each power converter includes a speed control loop configured to calculate a local current demand based at least in part on an output speed error between the speed demand of the one or more loads and a measured speed of the one or more loads; a torque/current control loop configured to calculate an output voltage demand based at least in part on the local current demand of its respective speed control loop; and a module configured to modulate the output voltage of an inverter based on the output voltage demand from the torque/current control loop.
H02P 4/00 - Arrangements specially adapted for regulating or controlling the speed or torque of electric motors that can be connected to two or more different electric power supplies
H02P 27/08 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters with pulse width modulation
An electrical connector for an aircraft power system includes: a first electrical contact; a second electrical contact; a housing; and a fixing element, the fixing element extending through the first electrical contact and the second electrical contact to connect the first electrical contact to the second electrical contact, wherein the housing surrounds the first electrical contact and the second electrical contact, the housing comprising electrical insulation to electrically insulate the first and second electrical contacts from an exterior of the housing.
A motion indicator includes a housing and a plunger extending from a first housing end of the housing and axially movable relative to the housing. The plunger is biased into an axially extended position via a plunger biasing element, and is configured to detect motion of a component adjacent to a plunger tip. A push button is located at a second housing end of the housing and is axially moveable relative to the housing. The push button is biased toward an axially extended position via a biasing element. A retaining assembly is configured to retain the push button in an axially retracted position. The retaining assembly is configured to release the push button and allow the button biasing element to urge the push button toward the axially extended position when the plunger is urged toward a retracted position via motion of the component adjacent to the plunger tip.
A method of detecting electrical arc damage includes receiving input indicative of electrical power as a function of time in an electrical arc. The method includes using the input to model an amount of damage caused by the electrical arc, and comparing the amount of damage to a predetermined threshold. The method includes flagging a warning in response to the amount of damage exceeding a predetermined threshold. The method can include breaking a circuit to stop the electrical arc. Flagging the warning can include signaling to an operator to inspect a unit potentially damaged by the electrical arc. The method can include inspecting the unit potentially damaged by the electrical arc.
G06F 30/27 - Design optimisation, verification or simulation using machine learning, e.g. artificial intelligence, neural networks, support vector machines [SVM] or training a model
A single stage servo valve assembly includes a drive assembly and a valve body assembly. The valve body assembly defines a valve body extending along a valve body axis (X) between a first valve body end and a second valve body end, a supply port, a control port and a return port formed through the valve body each defining a respective fluid flow channel, having a fluid flow axis, providing fluid communication between an interior of the valve body and an exterior of the valve body. The drive assembly operates to control the flow of fluid between the supply port, the control port and the return port, via the interior of the valve body, in response to an electric command signal; wherein a first nozzle is located in the valve body between the supply port and the control port and a second nozzle is located between the ports.
A flex spline for a strain wave drive, the flex spline comprising: a flexible tubular body (110) having a first open end (221) and a second open end (222); a first set of radially outwardly extending teeth around its outer periphery at the first open end; a second set of radially outwardly extending teeth around its outer periphery at the second open end; and a third set of radially inwardly outwardly teeth located axially between the first and the second sets of teeth; and wherein the body further comprises one or more sections of changed geometry located between the first and second sets of teeth and/or the second and third sets of teeth, the sections of changed geometry being provided with a geometric feature in the flex spline body that is not present in the remainder of the flex spline body.
A LLC voltage converter for converting a DC input voltage to a DC output voltage includes a transformer, a controller and a current sensor. The current sensor provides a measurement of the current through a first winding of a transformer to the controller. The controller determines a parameter relating to an output current of the LLC voltage converter using the current measurement. The controller also receives a parameter relating to an output current of at least one other LLC voltage converter, configured in parallel with the LLC voltage converter. The controller is arranged to control the LLC voltage converter based on both the parameter relating to the output current of the LLC voltage converter and the parameter relating to the output current of the other LLC voltage converter.
H02M 3/00 - Conversion of DC power input into DC power output
H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
92.
PARALLEL ELECTROHYDRAULIC SERVO VALVE CONTROLLED ACTUATOR WITH FAILURE ACCOMMODATION
A system includes a first electrohydraulic servo valve (EHSV) configured to be in fluid communication with a pressure supply and with a pressure return. The first EHSV includes a first actuator extend line and a first actuator retract line. A second EHSV is configured to be in fluid communication with the pressure supply and with the pressure return. The second EHSV includes a second actuator extend line and a second actuator retract line. An actuator includes an extend chamber in fluid communication with both of the first and second extend actuator lines, and a retract chamber in fluid communication with both of the first and second retract actuator lines for extending an end effector when the first and second EHSVs pressurize the extend chamber, and for retracting the end effector when the first and second EHSVs pressurize the retract chamber.
F15B 18/00 - Parallel arrangements of independent servomotor systems
F15B 20/00 - Safety arrangements for fluid actuator systemsApplications of safety devices in fluid actuator systemsEmergency measures for fluid actuator systems
93.
TUNABLE INDUCTOR AND METHODS TO REALIZE TUNABLE INDUCTOR
A tunable inductor is provided including a core having a closed shape and including first through third legs. A first winding wound around the first leg is coupled to a first controller configured to provide DC power to the first winding. The first winding is configured to generate a DC flux in a DC flux path in response to the DC power, the DC flux path passing through a first magnetoelectric material coupled to the core. A second winding wound around the second leg is coupled to the first controller and is configured to generate the DC flux in response to the DC power. A third leg between the first leg and the second leg is coupled to an AC power source configured to provide AC power to the third winding. The third winding is configured to generate AC flux in an AC flux path based on the AC power.
H01F 29/02 - Variable transformers or inductances not covered by group with tappings on coil or windingVariable transformers or inductances not covered by group with provision for rearrangement or interconnection of windings
An engine start system for an aircraft includes a first variable frequency start generator (VFSG) including a first exciter and a first stator, a second VFSG including a second exciter and a second stator, a first motor controller and a second motor controller, and a switching system. The switching system is configured to operatively connect the first motor controller to the first stator or the second exciter and operatively connect the second motor controller to the first exciter or the second stator. In a first mode of operation, the first motor controller is operatively connected to the second exciter, the second motor controller is operatively connected to the second stator, the first VFSG generates power, the first motor controller provides a first controlled voltage and frequency to the second exciter, and the second motor controller provides a second controlled voltage and frequency to the second stator.
B64D 33/00 - Arrangement in aircraft of power plant parts or auxiliaries not otherwise provided for
H02P 5/74 - Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling two or more AC dynamo-electric motors
A heat exchanger includes a heat exchanger body having a plurality of heat exchanger tubes, an inlet manifold connected to the heat exchanger body and configured to distribute a flow of fluid from a fluid inlet of the inlet manifold to the plurality of heat exchanger tubes, and an outlet manifold connected to the heat exchanger body and configured to collect the flow of fluid from the plurality of heat exchanger tubes and direct the flow of fluid through a fluid outlet. The heat exchanger body is formed via one or more additive manufacturing processes, and at least one of the inlet manifold and the outlet manifold is formed via one or more subtractive manufacturing processes.
F28D 1/053 - Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with the heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
B33Y 80/00 - Products made by additive manufacturing
A heat exchanger includes a plurality of heat exchanger plates stacked along a stacking axis defining a plurality of first pathways through which a first fluid is directed, and a plurality of fins located between adjacent first pathways of the plurality of first pathways. The plurality of fins at least partially define a plurality of second pathways through which a second fluid is directed. The heat exchanger plates are formed from a sheet material, and the plurality of fins are formed from one or more additive manufacturing processes.
F28F 3/04 - Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
97.
Single variable displacement fuel systems with fuel oil coolers
A system includes an actuation pump sub-system (APS) with an inlet configured to feed fuel from a fuel source into the APS, a first outlet configured for connecting the APS in fluid communication with an actuation system to supply fuel flow for actuation, a second outlet feeding into a supply line, and a third outlet feeding into the supply line. A fuel oil cooler (FOC) is included in a first branch of the supply line. The FOC is in fluid communication to receive flow from the second outlet. The APS includes a bypass valve (BPV) in a second branch of the supply line, in parallel with the FOC and in fluid communication to allow flow from the third outlet into the supply line bypassing the FOC. A main pump and control sub-system has a main inlet connected in fluid communication with the supply line downstream of the BPV and FOC.
Life support systems include a pressure garment, a helmet, and a life support system enclosure that define an enclosed environment. The life support system includes one or more life support components to generate breathable gas within the enclosed environment. The gas is directed along a closed-loop flow path through the system. The life support components includes a fan for driving a flow of the gas through the closed-loop flow path and an acoustic damper arranged along the flow path and to reduce noise generated by the fan. The acoustic damper includes a housing defining an annular cavity arranged about a portion of the flow path, with the housing having a solid exterior surface and an inner diameter surface with openings to fluidly connect the flow path with the annular cavity and at least one acoustic damping element arranged within the annular cavity.
In accordance with at least one aspect of this disclosure, a system includes a first wire configured to electrically connect a valve stop to a voltage source, a second wire configured to connect a valve pin to a negative terminal of the voltage source, such that the valve stop, and a valve flap operatively connected to the valve pin are configured to create a closed valve circuit when the valve flap is in a fully open position with the valve flap contacting the valve stop, and an open valve circuit when the valve flap is not in the fully open position. A meter is operatively connected to measure an electrical characteristic of the valve circuit to determine when the valve flap is in the fully open position based on an open/closed status of the valve circuit.
F16K 37/00 - Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
F16K 15/03 - Check valves with guided rigid valve members with a hinged closure member
100.
COLD START INDUCTION HEATING AND BRAKING ARRANGEMENT
A drive system for an aircraft. The drive system includes a controller, a motor coupled to an H-bridge network, a DC link that can be coupled to the motor; and an electrical braking system configured to be electrically coupled to the motor. The electrical braking system includes: a sense circuit configured to sense a condition of the DC link; a brake resistor coupled to the DC link; a temperature sensor; a drive circuit coupled to the sense circuit; and a coil for breaking in an inductive braking mode or generating heat in a cold start mode, wherein the coil is located in or near a line replaceable unit chassis that includes printed circuit boards.
